- Lichenland
- General information, synoptic key, teaching aids, and featured activities on lichens presented by Oregon State University.
- Lichens of North America
- Presents a list of lichen species, photos, sampler, and related links. Includes information on lichen biology and environment.
- Lichens.de
- Introduction to lichens with images, news, workshop reports, technical details, and links to related pages.
- Queensland Lichens
- Information about the lichens of subtropical Queensland presented by a professor from the University of Queensland in Brisbane.
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